Annihilus is a fictional character in Marvel Comics' Marvel Universe. In 2009, Annihilus was ranked as IGN's 94th Greatest Comic Book Villain of All Time.
The character first appears in Fantastic Four Annual #6 (1968), and was created by Stan Lee and Jack Kirby.
Untold millennia ago, the Tyannans, a technologically-advanced semi-humanoid/leonine species of the antimatter universe the Negative Zone, seeded barren worlds with life spores. A freak meteor collision hurled one of their ships into the volcanic planet Arthros, where the crew released their spores before starving to death. Many generations later, one of those spores evolved into a weak insectoid creature. Significantly intelligent due to a mutation, the creature found the Tyannan starship wreckage and used a knowledge transference helmet to master the advanced Tyannan technology. This enhanced his intelligence and strength, creating a "Cosmic Control Rod" and body armaments. Obsessed with survival, the paranoid creature, which came to be known as Annihilus, set out to destroy any other living being he viewed as a possible threat to his existence. Annihilus used his newly acquired power to dominate other lifeforms that had arisen from the spores on Arthros, and plotted to either conquer or destroy the neighboring worlds in the Negative Zone. He transformed many prisoners via the Tyannans' Gene Transmuter into his servile Scavengers.
Annihilus first encountered the Fantastic Four when Reed, Ben, and Johnny entered the Negative Zone seeking anti-particles needed to treat Sue's cosmic ray-related pregnancy complications. Annihilus' minions captured the heroes, but they escaped, stealing his Control Rod. They returned it after siphoning off the needed anti-particles and returned to Earth. Annihilus next invaded the Microverse, a dimension accessed via the energies of shrinking, sending his Insectivorid drones to conquer worlds in his name. Psycho-Man tried to control the dimensional interface leading to the Microverse, but the Insectovorids, emotionless and immune to his power, overran the entire Sub-Atomica System and forced him to retreat to his worldship. Psycho-Man captured the Silver Surfer and Spider-Man to power his weapons and drive off the invaders, but the heroes escaped, leaving Annihilus and Psycho-Man to battle for control of the worldship. Annihilus' Microverse invasion was presumably repelled.
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Official Site: Marvel Comics
Links: Annihilus Wikipedia page Annihilus Marvel Database page Annihilus Marvel.com page